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Massive star formation begins in cold and dense molecular clouds that
undergo significant physical and chemical change during protostellar
evolution. As the mass of the protostar grows, the stellar radiation heats
and ionizes material in its immediate surroundings. Massive stars are also
born predominately in dense clustered environments together with stars of
lower stellar masses. These unique characteristics, coupled with strong
feedback that massive young stars impart on their environment present a
rich laboratory for astrophysics, as well as present challenges in
unlocking these complex phenomena. In this presentation, I will review the
progress that ALMA has brought to this field during its past 5 years of
discovery. I'll highlight some questions that ALMA will (hopefully) tackle
in the next 5 years.